Improvement in feed-water heaters for steam-generators



PATENTED FEB. 2, 1869.

. E. EATON. FEED WATER HEATER FOR STEAM GENERATORS.

fit-t gaunt RICHARD EATON, or EATON LODGE, 'KENPTISH TOWN, ENGLAND.

Letters Patent No. 86,515, dated February 2, 1869. d

IMPROVEMENT IN FEED-WATER. HEATERS FOR STEAM-GENERATORS.

I'lle Schedule referred to in' these Letters Eatent and making part ofthe same.

Y had to the accompanying drawings, which are made a part of thisspecification.

The apparatus consists of two circular and concern tric pipes or tubularchambers, made in two or more sections, and connected by suitablecoupling, and when in position surrounds the boiler or smoke-arch. The

outer pipe or casing is connected, by means of suitable branches, withthe exhaust-pipes within t-hc smokebox, or at some other convenientpoint, and is, when the engine is running, constantly filled with theexhaust steam, which is employed asthe heating-agent. The inner pipeforms the conduit oi the iced-water, which is heated in its transitthercthrough, its ends being connected, respectively, with the feed-pumpand boiler. The apparatus is heated, when the engine is.

not running, by its contact with the boiler, sufliciently to preventfreezing. 4

In the drawings i 1 Figure l is a longitudinal section of the front endof a locomotive-boiler, having my improved feed-water heater applied.

Figure 2 is a transverse section thereof, on the planes indicated by thelines a: stand y y, fig. 1.

Figure 3 is an enlarged sectional view, illustrating the manner ofconnecting the sections of the chambers or pipes. j

A A represent the outer pipe or chamber, which is cast or otherwise madeof iron or other suitable metal, in two segmental parts or sections, asshown, said sec- .tionsbeing united at-the' tpp of the apparatusby-meaus of'bolts passing through the lips orfianges u at.

Its inner surface is provided with a notched rib, a a, which is fittedto the surface of the boiler, and forms a connection to conduct the heatof the latter to said chamber A when it is not otherwise heated.

Its lowcr ends are contracted, so as to be closed by the inner pipe, asrepresented at a", and its upper ends are provided with branches a,aujntcrmediate pipe, B, which is constructed and applied as representedin fig; 3, and forms the communication between its two parts. p i

It is further provided, preferably at a central point, with a pair ofbranches, a a, forthe admission of the exhaust steam;- and at its lowestpoints, with small drain-pipes, a, for the discharge of the waterresulting from the condensation of the steam.

O 0 represent the inner pipeor chamber. It is ariangcd within the pipeor chamber A, concentric there- 'with', its diameter being suflicicntlyless than that of connected by means of the bore of A to leave anannular space of the requisite area for the circulation of the steam, asrepresented in fig. 2.

It is constructed in two parts or sections, corresponding with those ofA, and is provided at its upper ends with male and femalecoupling-collars, cc, held together by the connection of A, said collarsbeing, respectively, of convex and concavo-convex form, and theirsurfaces turned to. a true spherical'shape, so as to fit perfectly tightinto each other, and into the seated ends of the sections of the pipe A,as represented in fig. 3.

The spherical form of the couplings adapts them to accommodatethemselves to any deviations in the pipe from the true line, caused byinaccuracies of workmanship, expansion, dzc.

The lower ends 0 of this pipe pass through the contracted portions a ofA, where they are connected, respectivcly, to the pipes leading from thepump and to biiu boiler, through the medium of bonds? or elbows D and E.

The steam is conducted to the pipe or chamber A I from the exhaust-pipesF, two in number, by means of pipes G H, opening into said pipes 1*,inside of the smoke-box, as represented, or at any other convenientpoint, and into the chamber A, through'the medium of the branches a.

The red arrows in the drawing indicate the course,

of the steam.

The blue arrows indicate the course .of the water. The operation of theapparatus is as follows:

The engine being started, the exhaust steam passes,

through the pipes F G H, and enters the chanrberA, at opposite sides,and circulates within said chamber, around the pipe 0, through which thefeed-water is being forced, with an intermittent motion, by the pump,and imparts its heat thereto, the feed-water then passing in ahighly-heated state to the boiler. The apparatus, surrounding the boileror smoke-arch, is not liable to freeze while the engine is standing onsidings, or running down long grades without steam, or when standing inthe steam-shed in winter, as would otherwise bethe case, as sufiicientheat will be imparted to it by its contact with the boiler toeffectually prevcnt this.

The circular form of the apparatus renders its parts simple and compact,and lessons materially the amount of piping required to form itsconnection with the boiler and pump.

The apparatus is quite out of the way, and does not present an unsightlyappearance.

I- am aware that feed-water heaters, in which the I convenientlylocated, and so liable to freeze and become useless in the winter, thatno successful use has hitherto been made of them.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The feed-water-heating apparatus, consisting of the pipes or tubularchambers A Aand C 0, arranged one within the other, and appliedsubstantially as herein described.

2. The construction and arrangement, on the chamber A, of the rib orflange a, whereby to form a heatccnducting connection with the surfaceto which said chamber A is applied, substantially as herein describedu.

3. The eoupling-collais c c", constructcd substantially as described, incombination with pipes or tubular lchambers A A, O O, substantially asherein set ort 1 To the above specification of my invention, I havesigned my band, this day of 1868.

' RICHARD EATON. \Vitnesses:

N. CLENDENNING, E. H. "STUART.

